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Darren Lissaman

Life? Don't talk to me about life!

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Edited by Darren Lissaman, Wednesday, 18 May 2011, 16:50

I started studying with the OU in March of 2009. Now, just two and a bit years later and with my current courses drawing to a close I thought I would reflect back on the person I was back then and the person I am now.

 

The DouglasAdams quote, spoken in The Hitchhickers Guide to the Galaxy by Marvin the paranoid android, is rather apt. Paranoid is pretty much how I felt. Always A-typical of my peer group, not really interested in the latest soap plot or last nights match, preferring to spend my time watching the Discovery channel or listening to Radio 4. Always the one concerned about climate change and the issues of the day without really doing anything about it dispite a brief flirtation with anti-vivisectionists in the mid 80's. Always atheistic and failing to see why anyone these days needs to believe in a god I never made my views known feeling that, maybe, it was me that was wrong. Maybe it wasn't how people were supposed to feel.

 

Then I enrolled with the OU. Here I found like minded people who, whilst not always agreeing with me, allowed discussion of subjects that I felt strongly about. This lead me to realise that there is a whole sub-culture out there who feel as I do and share my interests. This made me want to explore more and make new friends. I have now joined a political party (Though at least one friend is sure its the wrong one) and actively will post petitions and stories that I feel strongly about. It has lead me to new Radio programmes where people who think like me air their views (www.littleatoms.com is highly recommended) and just last week I was at the uncaged monkeys gig, a show based around science and reason and found organisations like Skeptics in the pub that I probably would never have known about if I had never got involved with the OU.

 

In the brief time I have been at the OU I have changed emensely. I just regret not doing it 20 years ago.

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Darren Lissaman

Its Life Jim, but not as we know it!

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Edited by Darren Lissaman, Sunday, 5 Dec 2010, 21:30

So, after the initial disappointment that the NASA announcement this week of the news that "would impact on the search for extraterrestrial life" turned out to involve microbes in a lake in California, I find myself growing genuinely excited at what this could mean.

 

The phrase "Life will find away" seems to get over used however this might actually prove to be true. These microbes once, back through the mist of time, constructed their D.N.A. in the way every other organism on earth does by using a framework built of phosphorous at selected points. Once these organism's habitat became cut off from fresh water Arsenic built up in the lake just as it has in lakes all over the world, most noticeably in Bangladesh where it has caused toxic poisoning in thousands of people who have no choice but to drink the water. In Mono Lake though these simple, by our standards, organisms have learnt to metabolise Arsenic. Not only eating it but replacing the phosphorous in their D.N.A. with Arsenic as well.

 

While this should not surprise us totally (Arsenic is directly below Phosphorous in the periodic table and so shares many of its attributes) no other life form on this planet has been proven to do this before! All of the life we know uses Phosphorus and is constructed from carbon, until now.

 

Now the question this raises for me is does life just use what is available within a certain parameter. As long as its in the same column could it instead pick Nitrogen or Antimony? Could an organism base itself on Silicon instead of Carbon. If this proves to be the case then searching for "Life as we know it" might be the biggest mistake we ever make. Planets we have ruled out because there is no way a carbon based life form could exist may just have become the very places we need to search. I really do believe that life exists in some form or another out there and I think we are getting closer to discovering it. I just hope that we haven't already missed it because we had narrowed out sights too much.

 

Thank you for your time

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